AO Condition? Which term is defined as a focal dilation of the aorta?

AO Condition? Which term is defined as a focal dilation of the aorta?

• A. Aortic dissection
• B. Aortic Ectasia
• C. Aneurysm
• D. Pseudoaneurysm

Answer: (C)

Focal dilation of the aorta is called an aneurysm. This means a localized bulge where the vessel wall has weakened but remains intact, involving all three layers of the arterial wall in a true aneurysm. In ultrasound practice, an abdominal aortic aneurysm is typically diagnosed when the diameter is significantly enlarged—often defined as ≥3 cm or about 50% larger than normal for that segment. This local enlargement distinguishes it from ectasia, which describes a more diffuse, longitudinal dilation along a portion of the aorta rather than a single focal bulge. Aortic dissection, by contrast, is a tear in the intima that creates a second, false lumen within the wall, not just dilation. A pseudoaneurysm is a contained rupture with a hematoma that communicates with the arterial lumen, again not a simple dilation. So the term that best fits a localized ballooning of the aorta is aneurysm.

Focal dilation of the aorta is called an aneurysm. This means a localized bulge where the vessel wall has weakened but remains intact, involving all three layers of the arterial wall in a true aneurysm. In ultrasound practice, an abdominal aortic aneurysm is typically diagnosed when the diameter is significantly enlarged—often defined as ≥3 cm or about 50% larger than normal for that segment. This local enlargement distinguishes it from ectasia, which describes a more diffuse, longitudinal dilation along a portion of the aorta rather than a single focal bulge. Aortic dissection, by contrast, is a tear in the intima that creates a second, false lumen within the wall, not just dilation. A pseudoaneurysm is a contained rupture with a hematoma that communicates with the arterial lumen, again not a simple dilation. So the term that best fits a localized ballooning of the aorta is aneurysm.